Findings are summaried related to restricting minority participation in the sciences and science-related professions. Four factors found most pervasive and important were: (1) lack of role models; (2) counseling; (3) attitude; and (4) preparation. Effects of both teacher attitude and student attitude were reviewed within the attitude area. The paper also reviews several promising practices currently being implemented to upgrade minority participation, including the roles of industry and institutions of higher education as well as collaborative efforts. (Author/DS)